我正在嘗試使用 PSTricks 用馬蹄形磁鐵重新創建圖像。我意識到有一個關於這個的問題使用 TikZ,但我更喜歡 PSTricks。我想用 PSTricks (pst-3dplot) 繪製如下所示的內容:
我已經查看了該pst-3dplot
包以獲取指導。他們有一個\pstThreeDBox
用於繪製簡單長方體(dt.Quader)的定義。受此啟發,並省略了不同座標視角的情況下的大部分巧妙定義(暫時使用coorType=0
),我最終得到了以下程式碼:
% Supposed to draw a threeD Horseshoe
\def\pstThreeDHorseshoe{\pst@object{pstThreeDHorseshoe}}
\def\pstThreeDHorseshoe@i(#1,#2,#3){%
\pst@killglue
\begingroup
\addbefore@par{alternative=false,linestyle=\psk@ThreeDplot@visibleLineStyle}%
\use@keep@par
\gdef\pst@tempX{#1 }%
\gdef\pst@tempY{#2 }%
\gdef\pst@tempZ{#3 }%
\pstThreeDHorseshoe@ii
}% end pstThreeDHorseshoe@i.
\def\pstThreeDHorseshoe@ii(#1,#2,#3)(#4,#5,#6)(#7,#8,#9){%
% Top square :
\pstThreeDSquare(\pst@tempX #1 add,\pst@tempY #2 add,\pst@tempZ #3 add)(#4,#5,#6)(#7,#8,#9)%
% First left square :
\pstThreeDSquare(\pst@tempX #4 add,\pst@tempY #5 add,\pst@tempZ #6 add)(#1 .15 mul,#2 .15 mul,#3 .15 mul)(#7,#8,#9)
% Second left square :
\pstThreeDSquare(\pst@tempX #4 add #1 .85 mul add,\pst@tempY #5 add #2 .85 mul add,\pst@tempZ #6 add #3 .85 mul add)(#1 .15 mul,#2 .15 mul,#3 .15 mul)(#7,#8,#9)
% first front bit :
\pstThreeDSquare(\pst@tempX #7 add,\pst@tempY #8 add,\pst@tempZ #9 add)(#1 .15 mul,#2 .15 mul,#3 .15 mul)(#4,#5,#6)
% second front bit :
\pstThreeDSquare(\pst@tempX #7 add #1 .85 mul add,\pst@tempY #8 add #2 .85 mul add,\pst@tempZ #9 add #3 .85 mul add)(#1 .15 mul,#2 .15 mul,#3 .15 mul)(#4,#5,#6)%
% Inside square one :
\pstThreeDSquare(\pst@tempX #7 .2 mul add #1 .15 mul add,\pst@tempY #8 .2 mul add #2 .15 mul add,\pst@tempZ #9 .2 mul add #3 .15 mul add)(#4,#5,#6)(#7 .8 mul,#8 .8 mul, #9 .8 mul)%
\pstThreeDSquare(\pst@tempX #7 .2 mul add #1 .85 mul add,\pst@tempY #8 .2 mul add #2 .85 mul add,\pst@tempZ #9 .2 mul add #3 .85 mul add)(#4,#5,#6)(#7 .8 mul,#8 .8 mul, #9 .8 mul)%
% Inside square three :
\pstThreeDSquare(\pst@tempX #7 .2 mul add #1 .15 mul add,\pst@tempY #8 .2 mul add #2 .15 mul add,\pst@tempZ #9 .2 mul add #3 .15 mul add)(#4,#5,#6)(#1 .7 mul,#2 .7 mul,#3 .7 mul)
% Back square :
\pstThreeDSquare(\pst@tempX,\pst@tempY,\pst@tempZ)(#4,#5,#6)(#1,#2,#3)
\endgroup
\ignorespaces
}% end pstThreeDHorseshoe@ii.
並運行
\pstThreeDHorseshoe(0,0,0)(0,0,2)(1.5,0,0)(0,3,0)
不應該可見的線條將被刪除。這樣做有參數invisibleLineStyle
,但沒有很好的文件記錄,只有半頁在這本書中。我嘗試用該線條樣式覆蓋一條線,但無濟於事。
我將接受一個答案,該答案展示瞭如何處理此參數invisibleLineStyle
並幫助我將其與馬蹄形的內部結構一起使用。
對於編輯:請建議一種巧妙的方法來引入 0.15、0.2 的變量,以便以後可以更改尺寸。
答案1
僅馬蹄形磁鐵:
\documentclass[]{article}
\pagestyle{empty}
\usepackage{pst-solides3d}
\begin{document}
\begin{pspicture}(-2,-3)(7,8)
\psset{viewpoint=20 28 15 rtp2xyz,lightsrc=20 60 60 rtp2xyz,Decran=30,solidmemory}
\psSolid[incolor=red,fillcolor=red,object=parallelepiped,a=2,b=0.75,c=1.5,grid=false,name=H2](0,-0.375,0.75)
\psSolid[incolor=red,fillcolor=red,object=parallelepiped,a=2,b=4,c=0.5,grid=false,name=H1](0,2,0.25)
\psSolid[incolor=red,fillcolor=green,object=parallelepiped,a=2,b=0.75,c=1.5,grid=false,name=H3](0,-0.375,2.25)
\psSolid[incolor=red,fillcolor=green,object=parallelepiped,a=2,b=4,c=0.5,grid=false,name=H4](0,2,2.75)
\end{pspicture}
\end{document}
完整範例中的圖像(評論中的連結)